10121165205555 has 8 divisors (see below), whose sum is σ = 16193864328912. Its totient is φ = 5397954776288.

The previous prime is 10121165205551. The next prime is 10121165205577. The reversal of 10121165205555 is 55550256112101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10121165205555 - 2² = 10121165205551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10121165205551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337372173504 + ... + 337372173533.

It is an arithmetic number, because the mean of its divisors is an integer number (2024233041114).

Almost surely, 2^{10121165205555} is an apocalyptic number.

10121165205555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

10121165205555 is a deficient number, since it is larger than the sum of its proper divisors (6072699123357).

10121165205555 is an equidigital number, since it uses as much as digits as its factorization.

10121165205555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674744347045.

The product of its (nonzero) digits is 75000, while the sum is 39.

The spelling of 10121165205555 in words is "ten trillion, one hundred twenty-one billion, one hundred sixty-five million, two hundred five thousand, five hundred fifty-five".